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Re: GCC inline parameters (PR 10160 testcase)


Op vr 02-05-2003, om 23:36 schreef Mark Mitchell:
> On Fri, 2003-05-02 at 14:14, Eric Botcazou wrote:
> > > I believe that we are about to ship 3.3 with a set of inline parameter
> > > defaults that are way too agressive.  These can cause huge increases
> > > in compilation time and memory over that with a more conservative
> > > set of parameters.
> > 
> > I think it's even worse: the new heuristics of the tree inliner is simply
> > broken, period. See http://gcc.gnu.org/ml/gcc/2003-04/msg00871.html for my
> > own take on PR 10160.
> 
> Hmm; I didn't know we'd changed our inlining heuristics to have this
> MIN_INLINE_INSNS concept.
> 
> You can, however, set that to zero using --params.
> 
> But, I think the scheduler is your real problem here; there shouldn't be
> n^2 algorithms in there, unless they have clamps.

No, that inliner heuristic is just wrong.  See PR 10155 for example.

Greetz
Steven



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